?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
powerpc/powernv: Report size of OPAL memcons log
[linux/fpc-iii.git] / arch / powerpc / platforms / cell / spufs / file.c
bloba35e2c29d7eed3b0ee15f2e088e3c0d4aeb8b19a
1 /*
2 * SPU file system -- file contents
3 *
4 * (C) Copyright IBM Deutschland Entwicklung GmbH 2005
5 *
6 * Author: Arnd Bergmann <arndb@de.ibm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23 #undef DEBUG
24
25 #include <linux/fs.h>
26 #include <linux/ioctl.h>
27 #include <linux/export.h>
28 #include <linux/pagemap.h>
29 #include <linux/poll.h>
30 #include <linux/ptrace.h>
31 #include <linux/seq_file.h>
32 #include <linux/slab.h>
33
34 #include <asm/io.h>
35 #include <asm/time.h>
36 #include <asm/spu.h>
37 #include <asm/spu_info.h>
38 #include <linux/uaccess.h>
39
40 #include "spufs.h"
41 #include "sputrace.h"
42
43 #define SPUFS_MMAP_4K (PAGE_SIZE == 0x1000)
44
45 /* Simple attribute files */
46 struct spufs_attr {
47 int (*get)(void *, u64 *);
48 int (*set)(void *, u64);
49 char get_buf[24]; /* enough to store a u64 and "\n\0" */
50 char set_buf[24];
51 void *data;
52 const char *fmt; /* format for read operation */
53 struct mutex mutex; /* protects access to these buffers */
54 };
55
56 static int spufs_attr_open(struct inode *inode, struct file *file,
57 int (*get)(void *, u64 *), int (*set)(void *, u64),
58 const char *fmt)
59 {
60 struct spufs_attr *attr;
61
62 attr = kmalloc(sizeof(*attr), GFP_KERNEL);
63 if (!attr)
64 return -ENOMEM;
65
66 attr->get = get;
67 attr->set = set;
68 attr->data = inode->i_private;
69 attr->fmt = fmt;
70 mutex_init(&attr->mutex);
71 file->private_data = attr;
72
73 return nonseekable_open(inode, file);
74 }
75
76 static int spufs_attr_release(struct inode *inode, struct file *file)
77 {
78 kfree(file->private_data);
79 return 0;
80 }
81
82 static ssize_t spufs_attr_read(struct file *file, char __user *buf,
83 size_t len, loff_t *ppos)
84 {
85 struct spufs_attr *attr;
86 size_t size;
87 ssize_t ret;
88
89 attr = file->private_data;
90 if (!attr->get)
91 return -EACCES;
92
93 ret = mutex_lock_interruptible(&attr->mutex);
94 if (ret)
95 return ret;
96
97 if (*ppos) { /* continued read */
98 size = strlen(attr->get_buf);
99 } else { /* first read */
100 u64 val;
101 ret = attr->get(attr->data, &val);
102 if (ret)
103 goto out;
104
105 size = scnprintf(attr->get_buf, sizeof(attr->get_buf),
106 attr->fmt, (unsigned long long)val);
107 }
108
109 ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size);
110 out:
111 mutex_unlock(&attr->mutex);
112 return ret;
113 }
114
115 static ssize_t spufs_attr_write(struct file *file, const char __user *buf,
116 size_t len, loff_t *ppos)
117 {
118 struct spufs_attr *attr;
119 u64 val;
120 size_t size;
121 ssize_t ret;
122
123 attr = file->private_data;
124 if (!attr->set)
125 return -EACCES;
126
127 ret = mutex_lock_interruptible(&attr->mutex);
128 if (ret)
129 return ret;
130
131 ret = -EFAULT;
132 size = min(sizeof(attr->set_buf) - 1, len);
133 if (copy_from_user(attr->set_buf, buf, size))
134 goto out;
135
136 ret = len; /* claim we got the whole input */
137 attr->set_buf[size] = '\0';
138 val = simple_strtol(attr->set_buf, NULL, 0);
139 attr->set(attr->data, val);
140 out:
141 mutex_unlock(&attr->mutex);
142 return ret;
143 }
144
145 #define DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt) \
146 static int __fops ## _open(struct inode *inode, struct file *file) \
147 { \
148 __simple_attr_check_format(__fmt, 0ull); \
149 return spufs_attr_open(inode, file, __get, __set, __fmt); \
150 } \
151 static const struct file_operations __fops = { \
152 .open = __fops ## _open, \
153 .release = spufs_attr_release, \
154 .read = spufs_attr_read, \
155 .write = spufs_attr_write, \
156 .llseek = generic_file_llseek, \
157 };
158
159
160 static int
161 spufs_mem_open(struct inode *inode, struct file *file)
162 {
163 struct spufs_inode_info *i = SPUFS_I(inode);
164 struct spu_context *ctx = i->i_ctx;
165
166 mutex_lock(&ctx->mapping_lock);
167 file->private_data = ctx;
168 if (!i->i_openers++)
169 ctx->local_store = inode->i_mapping;
170 mutex_unlock(&ctx->mapping_lock);
171 return 0;
172 }
173
174 static int
175 spufs_mem_release(struct inode *inode, struct file *file)
176 {
177 struct spufs_inode_info *i = SPUFS_I(inode);
178 struct spu_context *ctx = i->i_ctx;
179
180 mutex_lock(&ctx->mapping_lock);
181 if (!--i->i_openers)
182 ctx->local_store = NULL;
183 mutex_unlock(&ctx->mapping_lock);
184 return 0;
185 }
186
187 static ssize_t
188 __spufs_mem_read(struct spu_context *ctx, char __user *buffer,
189 size_t size, loff_t *pos)
190 {
191 char *local_store = ctx->ops->get_ls(ctx);
192 return simple_read_from_buffer(buffer, size, pos, local_store,
193 LS_SIZE);
194 }
195
196 static ssize_t
197 spufs_mem_read(struct file *file, char __user *buffer,
198 size_t size, loff_t *pos)
199 {
200 struct spu_context *ctx = file->private_data;
201 ssize_t ret;
202
203 ret = spu_acquire(ctx);
204 if (ret)
205 return ret;
206 ret = __spufs_mem_read(ctx, buffer, size, pos);
207 spu_release(ctx);
208
209 return ret;
210 }
211
212 static ssize_t
213 spufs_mem_write(struct file *file, const char __user *buffer,
214 size_t size, loff_t *ppos)
215 {
216 struct spu_context *ctx = file->private_data;
217 char *local_store;
218 loff_t pos = *ppos;
219 int ret;
220
221 if (pos > LS_SIZE)
222 return -EFBIG;
223
224 ret = spu_acquire(ctx);
225 if (ret)
226 return ret;
227
228 local_store = ctx->ops->get_ls(ctx);
229 size = simple_write_to_buffer(local_store, LS_SIZE, ppos, buffer, size);
230 spu_release(ctx);
231
232 return size;
233 }
234
235 static int
236 spufs_mem_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
237 {
238 struct spu_context *ctx = vma->vm_file->private_data;
239 unsigned long pfn, offset;
240
241 offset = vmf->pgoff << PAGE_SHIFT;
242 if (offset >= LS_SIZE)
243 return VM_FAULT_SIGBUS;
244
245 pr_debug("spufs_mem_mmap_fault address=0x%lx, offset=0x%lx\n",
246 vmf->address, offset);
247
248 if (spu_acquire(ctx))
249 return VM_FAULT_NOPAGE;
250
251 if (ctx->state == SPU_STATE_SAVED) {
252 vma->vm_page_prot = pgprot_cached(vma->vm_page_prot);
253 pfn = vmalloc_to_pfn(ctx->csa.lscsa->ls + offset);
254 } else {
255 vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot);
256 pfn = (ctx->spu->local_store_phys + offset) >> PAGE_SHIFT;
257 }
258 vm_insert_pfn(vma, vmf->address, pfn);
259
260 spu_release(ctx);
261
262 return VM_FAULT_NOPAGE;
263 }
264
265 static int spufs_mem_mmap_access(struct vm_area_struct *vma,
266 unsigned long address,
267 void *buf, int len, int write)
268 {
269 struct spu_context *ctx = vma->vm_file->private_data;
270 unsigned long offset = address - vma->vm_start;
271 char *local_store;
272
273 if (write && !(vma->vm_flags & VM_WRITE))
274 return -EACCES;
275 if (spu_acquire(ctx))
276 return -EINTR;
277 if ((offset + len) > vma->vm_end)
278 len = vma->vm_end - offset;
279 local_store = ctx->ops->get_ls(ctx);
280 if (write)
281 memcpy_toio(local_store + offset, buf, len);
282 else
283 memcpy_fromio(buf, local_store + offset, len);
284 spu_release(ctx);
285 return len;
286 }
287
288 static const struct vm_operations_struct spufs_mem_mmap_vmops = {
289 .fault = spufs_mem_mmap_fault,
290 .access = spufs_mem_mmap_access,
291 };
292
293 static int spufs_mem_mmap(struct file *file, struct vm_area_struct *vma)
294 {
295 if (!(vma->vm_flags & VM_SHARED))
296 return -EINVAL;
297
298 vma->vm_flags |= VM_IO | VM_PFNMAP;
299 vma->vm_page_prot = pgprot_noncached_wc(vma->vm_page_prot);
300
301 vma->vm_ops = &spufs_mem_mmap_vmops;
302 return 0;
303 }
304
305 static const struct file_operations spufs_mem_fops = {
306 .open = spufs_mem_open,
307 .release = spufs_mem_release,
308 .read = spufs_mem_read,
309 .write = spufs_mem_write,
310 .llseek = generic_file_llseek,
311 .mmap = spufs_mem_mmap,
312 };
313
314 static int spufs_ps_fault(struct vm_area_struct *vma,
315 struct vm_fault *vmf,
316 unsigned long ps_offs,
317 unsigned long ps_size)
318 {
319 struct spu_context *ctx = vma->vm_file->private_data;
320 unsigned long area, offset = vmf->pgoff << PAGE_SHIFT;
321 int ret = 0;
322
323 spu_context_nospu_trace(spufs_ps_fault__enter, ctx);
324
325 if (offset >= ps_size)
326 return VM_FAULT_SIGBUS;
327
328 if (fatal_signal_pending(current))
329 return VM_FAULT_SIGBUS;
330
331 /*
332 * Because we release the mmap_sem, the context may be destroyed while
333 * we're in spu_wait. Grab an extra reference so it isn't destroyed
334 * in the meantime.
335 */
336 get_spu_context(ctx);
337
338 /*
339 * We have to wait for context to be loaded before we have
340 * pages to hand out to the user, but we don't want to wait
341 * with the mmap_sem held.
342 * It is possible to drop the mmap_sem here, but then we need
343 * to return VM_FAULT_NOPAGE because the mappings may have
344 * hanged.
345 */
346 if (spu_acquire(ctx))
347 goto refault;
348
349 if (ctx->state == SPU_STATE_SAVED) {
350 up_read(&current->mm->mmap_sem);
351 spu_context_nospu_trace(spufs_ps_fault__sleep, ctx);
352 ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
353 spu_context_trace(spufs_ps_fault__wake, ctx, ctx->spu);
354 down_read(&current->mm->mmap_sem);
355 } else {
356 area = ctx->spu->problem_phys + ps_offs;
357 vm_insert_pfn(vma, vmf->address, (area + offset) >> PAGE_SHIFT);
358 spu_context_trace(spufs_ps_fault__insert, ctx, ctx->spu);
359 }
360
361 if (!ret)
362 spu_release(ctx);
363
364 refault:
365 put_spu_context(ctx);
366 return VM_FAULT_NOPAGE;
367 }
368
369 #if SPUFS_MMAP_4K
370 static int spufs_cntl_mmap_fault(struct vm_area_struct *vma,
371 struct vm_fault *vmf)
372 {
373 return spufs_ps_fault(vma, vmf, 0x4000, SPUFS_CNTL_MAP_SIZE);
374 }
375
376 static const struct vm_operations_struct spufs_cntl_mmap_vmops = {
377 .fault = spufs_cntl_mmap_fault,
378 };
379
380 /*
381 * mmap support for problem state control area [0x4000 - 0x4fff].
382 */
383 static int spufs_cntl_mmap(struct file *file, struct vm_area_struct *vma)
384 {
385 if (!(vma->vm_flags & VM_SHARED))
386 return -EINVAL;
387
388 vma->vm_flags |= VM_IO | VM_PFNMAP;
389 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
390
391 vma->vm_ops = &spufs_cntl_mmap_vmops;
392 return 0;
393 }
394 #else /* SPUFS_MMAP_4K */
395 #define spufs_cntl_mmap NULL
396 #endif /* !SPUFS_MMAP_4K */
397
398 static int spufs_cntl_get(void *data, u64 *val)
399 {
400 struct spu_context *ctx = data;
401 int ret;
402
403 ret = spu_acquire(ctx);
404 if (ret)
405 return ret;
406 *val = ctx->ops->status_read(ctx);
407 spu_release(ctx);
408
409 return 0;
410 }
411
412 static int spufs_cntl_set(void *data, u64 val)
413 {
414 struct spu_context *ctx = data;
415 int ret;
416
417 ret = spu_acquire(ctx);
418 if (ret)
419 return ret;
420 ctx->ops->runcntl_write(ctx, val);
421 spu_release(ctx);
422
423 return 0;
424 }
425
426 static int spufs_cntl_open(struct inode *inode, struct file *file)
427 {
428 struct spufs_inode_info *i = SPUFS_I(inode);
429 struct spu_context *ctx = i->i_ctx;
430
431 mutex_lock(&ctx->mapping_lock);
432 file->private_data = ctx;
433 if (!i->i_openers++)
434 ctx->cntl = inode->i_mapping;
435 mutex_unlock(&ctx->mapping_lock);
436 return simple_attr_open(inode, file, spufs_cntl_get,
437 spufs_cntl_set, "0x%08lx");
438 }
439
440 static int
441 spufs_cntl_release(struct inode *inode, struct file *file)
442 {
443 struct spufs_inode_info *i = SPUFS_I(inode);
444 struct spu_context *ctx = i->i_ctx;
445
446 simple_attr_release(inode, file);
447
448 mutex_lock(&ctx->mapping_lock);
449 if (!--i->i_openers)
450 ctx->cntl = NULL;
451 mutex_unlock(&ctx->mapping_lock);
452 return 0;
453 }
454
455 static const struct file_operations spufs_cntl_fops = {
456 .open = spufs_cntl_open,
457 .release = spufs_cntl_release,
458 .read = simple_attr_read,
459 .write = simple_attr_write,
460 .llseek = generic_file_llseek,
461 .mmap = spufs_cntl_mmap,
462 };
463
464 static int
465 spufs_regs_open(struct inode *inode, struct file *file)
466 {
467 struct spufs_inode_info *i = SPUFS_I(inode);
468 file->private_data = i->i_ctx;
469 return 0;
470 }
471
472 static ssize_t
473 __spufs_regs_read(struct spu_context *ctx, char __user *buffer,
474 size_t size, loff_t *pos)
475 {
476 struct spu_lscsa *lscsa = ctx->csa.lscsa;
477 return simple_read_from_buffer(buffer, size, pos,
478 lscsa->gprs, sizeof lscsa->gprs);
479 }
480
481 static ssize_t
482 spufs_regs_read(struct file *file, char __user *buffer,
483 size_t size, loff_t *pos)
484 {
485 int ret;
486 struct spu_context *ctx = file->private_data;
487
488 /* pre-check for file position: if we'd return EOF, there's no point
489 * causing a deschedule */
490 if (*pos >= sizeof(ctx->csa.lscsa->gprs))
491 return 0;
492
493 ret = spu_acquire_saved(ctx);
494 if (ret)
495 return ret;
496 ret = __spufs_regs_read(ctx, buffer, size, pos);
497 spu_release_saved(ctx);
498 return ret;
499 }
500
501 static ssize_t
502 spufs_regs_write(struct file *file, const char __user *buffer,
503 size_t size, loff_t *pos)
504 {
505 struct spu_context *ctx = file->private_data;
506 struct spu_lscsa *lscsa = ctx->csa.lscsa;
507 int ret;
508
509 if (*pos >= sizeof(lscsa->gprs))
510 return -EFBIG;
511
512 ret = spu_acquire_saved(ctx);
513 if (ret)
514 return ret;
515
516 size = simple_write_to_buffer(lscsa->gprs, sizeof(lscsa->gprs), pos,
517 buffer, size);
518
519 spu_release_saved(ctx);
520 return size;
521 }
522
523 static const struct file_operations spufs_regs_fops = {
524 .open = spufs_regs_open,
525 .read = spufs_regs_read,
526 .write = spufs_regs_write,
527 .llseek = generic_file_llseek,
528 };
529
530 static ssize_t
531 __spufs_fpcr_read(struct spu_context *ctx, char __user * buffer,
532 size_t size, loff_t * pos)
533 {
534 struct spu_lscsa *lscsa = ctx->csa.lscsa;
535 return simple_read_from_buffer(buffer, size, pos,
536 &lscsa->fpcr, sizeof(lscsa->fpcr));
537 }
538
539 static ssize_t
540 spufs_fpcr_read(struct file *file, char __user * buffer,
541 size_t size, loff_t * pos)
542 {
543 int ret;
544 struct spu_context *ctx = file->private_data;
545
546 ret = spu_acquire_saved(ctx);
547 if (ret)
548 return ret;
549 ret = __spufs_fpcr_read(ctx, buffer, size, pos);
550 spu_release_saved(ctx);
551 return ret;
552 }
553
554 static ssize_t
555 spufs_fpcr_write(struct file *file, const char __user * buffer,
556 size_t size, loff_t * pos)
557 {
558 struct spu_context *ctx = file->private_data;
559 struct spu_lscsa *lscsa = ctx->csa.lscsa;
560 int ret;
561
562 if (*pos >= sizeof(lscsa->fpcr))
563 return -EFBIG;
564
565 ret = spu_acquire_saved(ctx);
566 if (ret)
567 return ret;
568
569 size = simple_write_to_buffer(&lscsa->fpcr, sizeof(lscsa->fpcr), pos,
570 buffer, size);
571
572 spu_release_saved(ctx);
573 return size;
574 }
575
576 static const struct file_operations spufs_fpcr_fops = {
577 .open = spufs_regs_open,
578 .read = spufs_fpcr_read,
579 .write = spufs_fpcr_write,
580 .llseek = generic_file_llseek,
581 };
582
583 /* generic open function for all pipe-like files */
584 static int spufs_pipe_open(struct inode *inode, struct file *file)
585 {
586 struct spufs_inode_info *i = SPUFS_I(inode);
587 file->private_data = i->i_ctx;
588
589 return nonseekable_open(inode, file);
590 }
591
592 /*
593 * Read as many bytes from the mailbox as possible, until
594 * one of the conditions becomes true:
595 *
596 * - no more data available in the mailbox
597 * - end of the user provided buffer
598 * - end of the mapped area
599 */
600 static ssize_t spufs_mbox_read(struct file *file, char __user *buf,
601 size_t len, loff_t *pos)
602 {
603 struct spu_context *ctx = file->private_data;
604 u32 mbox_data, __user *udata;
605 ssize_t count;
606
607 if (len < 4)
608 return -EINVAL;
609
610 if (!access_ok(VERIFY_WRITE, buf, len))
611 return -EFAULT;
612
613 udata = (void __user *)buf;
614
615 count = spu_acquire(ctx);
616 if (count)
617 return count;
618
619 for (count = 0; (count + 4) <= len; count += 4, udata++) {
620 int ret;
621 ret = ctx->ops->mbox_read(ctx, &mbox_data);
622 if (ret == 0)
623 break;
624
625 /*
626 * at the end of the mapped area, we can fault
627 * but still need to return the data we have
628 * read successfully so far.
629 */
630 ret = __put_user(mbox_data, udata);
631 if (ret) {
632 if (!count)
633 count = -EFAULT;
634 break;
635 }
636 }
637 spu_release(ctx);
638
639 if (!count)
640 count = -EAGAIN;
641
642 return count;
643 }
644
645 static const struct file_operations spufs_mbox_fops = {
646 .open = spufs_pipe_open,
647 .read = spufs_mbox_read,
648 .llseek = no_llseek,
649 };
650
651 static ssize_t spufs_mbox_stat_read(struct file *file, char __user *buf,
652 size_t len, loff_t *pos)
653 {
654 struct spu_context *ctx = file->private_data;
655 ssize_t ret;
656 u32 mbox_stat;
657
658 if (len < 4)
659 return -EINVAL;
660
661 ret = spu_acquire(ctx);
662 if (ret)
663 return ret;
664
665 mbox_stat = ctx->ops->mbox_stat_read(ctx) & 0xff;
666
667 spu_release(ctx);
668
669 if (copy_to_user(buf, &mbox_stat, sizeof mbox_stat))
670 return -EFAULT;
671
672 return 4;
673 }
674
675 static const struct file_operations spufs_mbox_stat_fops = {
676 .open = spufs_pipe_open,
677 .read = spufs_mbox_stat_read,
678 .llseek = no_llseek,
679 };
680
681 /* low-level ibox access function */
682 size_t spu_ibox_read(struct spu_context *ctx, u32 *data)
683 {
684 return ctx->ops->ibox_read(ctx, data);
685 }
686
687 static int spufs_ibox_fasync(int fd, struct file *file, int on)
688 {
689 struct spu_context *ctx = file->private_data;
690
691 return fasync_helper(fd, file, on, &ctx->ibox_fasync);
692 }
693
694 /* interrupt-level ibox callback function. */
695 void spufs_ibox_callback(struct spu *spu)
696 {
697 struct spu_context *ctx = spu->ctx;
698
699 if (!ctx)
700 return;
701
702 wake_up_all(&ctx->ibox_wq);
703 kill_fasync(&ctx->ibox_fasync, SIGIO, POLLIN);
704 }
705
706 /*
707 * Read as many bytes from the interrupt mailbox as possible, until
708 * one of the conditions becomes true:
709 *
710 * - no more data available in the mailbox
711 * - end of the user provided buffer
712 * - end of the mapped area
713 *
714 * If the file is opened without O_NONBLOCK, we wait here until
715 * any data is available, but return when we have been able to
716 * read something.
717 */
718 static ssize_t spufs_ibox_read(struct file *file, char __user *buf,
719 size_t len, loff_t *pos)
720 {
721 struct spu_context *ctx = file->private_data;
722 u32 ibox_data, __user *udata;
723 ssize_t count;
724
725 if (len < 4)
726 return -EINVAL;
727
728 if (!access_ok(VERIFY_WRITE, buf, len))
729 return -EFAULT;
730
731 udata = (void __user *)buf;
732
733 count = spu_acquire(ctx);
734 if (count)
735 goto out;
736
737 /* wait only for the first element */
738 count = 0;
739 if (file->f_flags & O_NONBLOCK) {
740 if (!spu_ibox_read(ctx, &ibox_data)) {
741 count = -EAGAIN;
742 goto out_unlock;
743 }
744 } else {
745 count = spufs_wait(ctx->ibox_wq, spu_ibox_read(ctx, &ibox_data));
746 if (count)
747 goto out;
748 }
749
750 /* if we can't write at all, return -EFAULT */
751 count = __put_user(ibox_data, udata);
752 if (count)
753 goto out_unlock;
754
755 for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
756 int ret;
757 ret = ctx->ops->ibox_read(ctx, &ibox_data);
758 if (ret == 0)
759 break;
760 /*
761 * at the end of the mapped area, we can fault
762 * but still need to return the data we have
763 * read successfully so far.
764 */
765 ret = __put_user(ibox_data, udata);
766 if (ret)
767 break;
768 }
769
770 out_unlock:
771 spu_release(ctx);
772 out:
773 return count;
774 }
775
776 static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
777 {
778 struct spu_context *ctx = file->private_data;
779 unsigned int mask;
780
781 poll_wait(file, &ctx->ibox_wq, wait);
782
783 /*
784 * For now keep this uninterruptible and also ignore the rule
785 * that poll should not sleep. Will be fixed later.
786 */
787 mutex_lock(&ctx->state_mutex);
788 mask = ctx->ops->mbox_stat_poll(ctx, POLLIN | POLLRDNORM);
789 spu_release(ctx);
790
791 return mask;
792 }
793
794 static const struct file_operations spufs_ibox_fops = {
795 .open = spufs_pipe_open,
796 .read = spufs_ibox_read,
797 .poll = spufs_ibox_poll,
798 .fasync = spufs_ibox_fasync,
799 .llseek = no_llseek,
800 };
801
802 static ssize_t spufs_ibox_stat_read(struct file *file, char __user *buf,
803 size_t len, loff_t *pos)
804 {
805 struct spu_context *ctx = file->private_data;
806 ssize_t ret;
807 u32 ibox_stat;
808
809 if (len < 4)
810 return -EINVAL;
811
812 ret = spu_acquire(ctx);
813 if (ret)
814 return ret;
815 ibox_stat = (ctx->ops->mbox_stat_read(ctx) >> 16) & 0xff;
816 spu_release(ctx);
817
818 if (copy_to_user(buf, &ibox_stat, sizeof ibox_stat))
819 return -EFAULT;
820
821 return 4;
822 }
823
824 static const struct file_operations spufs_ibox_stat_fops = {
825 .open = spufs_pipe_open,
826 .read = spufs_ibox_stat_read,
827 .llseek = no_llseek,
828 };
829
830 /* low-level mailbox write */
831 size_t spu_wbox_write(struct spu_context *ctx, u32 data)
832 {
833 return ctx->ops->wbox_write(ctx, data);
834 }
835
836 static int spufs_wbox_fasync(int fd, struct file *file, int on)
837 {
838 struct spu_context *ctx = file->private_data;
839 int ret;
840
841 ret = fasync_helper(fd, file, on, &ctx->wbox_fasync);
842
843 return ret;
844 }
845
846 /* interrupt-level wbox callback function. */
847 void spufs_wbox_callback(struct spu *spu)
848 {
849 struct spu_context *ctx = spu->ctx;
850
851 if (!ctx)
852 return;
853
854 wake_up_all(&ctx->wbox_wq);
855 kill_fasync(&ctx->wbox_fasync, SIGIO, POLLOUT);
856 }
857
858 /*
859 * Write as many bytes to the interrupt mailbox as possible, until
860 * one of the conditions becomes true:
861 *
862 * - the mailbox is full
863 * - end of the user provided buffer
864 * - end of the mapped area
865 *
866 * If the file is opened without O_NONBLOCK, we wait here until
867 * space is available, but return when we have been able to
868 * write something.
869 */
870 static ssize_t spufs_wbox_write(struct file *file, const char __user *buf,
871 size_t len, loff_t *pos)
872 {
873 struct spu_context *ctx = file->private_data;
874 u32 wbox_data, __user *udata;
875 ssize_t count;
876
877 if (len < 4)
878 return -EINVAL;
879
880 udata = (void __user *)buf;
881 if (!access_ok(VERIFY_READ, buf, len))
882 return -EFAULT;
883
884 if (__get_user(wbox_data, udata))
885 return -EFAULT;
886
887 count = spu_acquire(ctx);
888 if (count)
889 goto out;
890
891 /*
892 * make sure we can at least write one element, by waiting
893 * in case of !O_NONBLOCK
894 */
895 count = 0;
896 if (file->f_flags & O_NONBLOCK) {
897 if (!spu_wbox_write(ctx, wbox_data)) {
898 count = -EAGAIN;
899 goto out_unlock;
900 }
901 } else {
902 count = spufs_wait(ctx->wbox_wq, spu_wbox_write(ctx, wbox_data));
903 if (count)
904 goto out;
905 }
906
907
908 /* write as much as possible */
909 for (count = 4, udata++; (count + 4) <= len; count += 4, udata++) {
910 int ret;
911 ret = __get_user(wbox_data, udata);
912 if (ret)
913 break;
914
915 ret = spu_wbox_write(ctx, wbox_data);
916 if (ret == 0)
917 break;
918 }
919
920 out_unlock:
921 spu_release(ctx);
922 out:
923 return count;
924 }
925
926 static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
927 {
928 struct spu_context *ctx = file->private_data;
929 unsigned int mask;
930
931 poll_wait(file, &ctx->wbox_wq, wait);
932
933 /*
934 * For now keep this uninterruptible and also ignore the rule
935 * that poll should not sleep. Will be fixed later.
936 */
937 mutex_lock(&ctx->state_mutex);
938 mask = ctx->ops->mbox_stat_poll(ctx, POLLOUT | POLLWRNORM);
939 spu_release(ctx);
940
941 return mask;
942 }
943
944 static const struct file_operations spufs_wbox_fops = {
945 .open = spufs_pipe_open,
946 .write = spufs_wbox_write,
947 .poll = spufs_wbox_poll,
948 .fasync = spufs_wbox_fasync,
949 .llseek = no_llseek,
950 };
951
952 static ssize_t spufs_wbox_stat_read(struct file *file, char __user *buf,
953 size_t len, loff_t *pos)
954 {
955 struct spu_context *ctx = file->private_data;
956 ssize_t ret;
957 u32 wbox_stat;
958
959 if (len < 4)
960 return -EINVAL;
961
962 ret = spu_acquire(ctx);
963 if (ret)
964 return ret;
965 wbox_stat = (ctx->ops->mbox_stat_read(ctx) >> 8) & 0xff;
966 spu_release(ctx);
967
968 if (copy_to_user(buf, &wbox_stat, sizeof wbox_stat))
969 return -EFAULT;
970
971 return 4;
972 }
973
974 static const struct file_operations spufs_wbox_stat_fops = {
975 .open = spufs_pipe_open,
976 .read = spufs_wbox_stat_read,
977 .llseek = no_llseek,
978 };
979
980 static int spufs_signal1_open(struct inode *inode, struct file *file)
981 {
982 struct spufs_inode_info *i = SPUFS_I(inode);
983 struct spu_context *ctx = i->i_ctx;
984
985 mutex_lock(&ctx->mapping_lock);
986 file->private_data = ctx;
987 if (!i->i_openers++)
988 ctx->signal1 = inode->i_mapping;
989 mutex_unlock(&ctx->mapping_lock);
990 return nonseekable_open(inode, file);
991 }
992
993 static int
994 spufs_signal1_release(struct inode *inode, struct file *file)
995 {
996 struct spufs_inode_info *i = SPUFS_I(inode);
997 struct spu_context *ctx = i->i_ctx;
998
999 mutex_lock(&ctx->mapping_lock);
1000 if (!--i->i_openers)
1001 ctx->signal1 = NULL;
1002 mutex_unlock(&ctx->mapping_lock);
1003 return 0;
1004 }
1005
1006 static ssize_t __spufs_signal1_read(struct spu_context *ctx, char __user *buf,
1007 size_t len, loff_t *pos)
1008 {
1009 int ret = 0;
1010 u32 data;
1011
1012 if (len < 4)
1013 return -EINVAL;
1014
1015 if (ctx->csa.spu_chnlcnt_RW[3]) {
1016 data = ctx->csa.spu_chnldata_RW[3];
1017 ret = 4;
1018 }
1019
1020 if (!ret)
1021 goto out;
1022
1023 if (copy_to_user(buf, &data, 4))
1024 return -EFAULT;
1025
1026 out:
1027 return ret;
1028 }
1029
1030 static ssize_t spufs_signal1_read(struct file *file, char __user *buf,
1031 size_t len, loff_t *pos)
1032 {
1033 int ret;
1034 struct spu_context *ctx = file->private_data;
1035
1036 ret = spu_acquire_saved(ctx);
1037 if (ret)
1038 return ret;
1039 ret = __spufs_signal1_read(ctx, buf, len, pos);
1040 spu_release_saved(ctx);
1041
1042 return ret;
1043 }
1044
1045 static ssize_t spufs_signal1_write(struct file *file, const char __user *buf,
1046 size_t len, loff_t *pos)
1047 {
1048 struct spu_context *ctx;
1049 ssize_t ret;
1050 u32 data;
1051
1052 ctx = file->private_data;
1053
1054 if (len < 4)
1055 return -EINVAL;
1056
1057 if (copy_from_user(&data, buf, 4))
1058 return -EFAULT;
1059
1060 ret = spu_acquire(ctx);
1061 if (ret)
1062 return ret;
1063 ctx->ops->signal1_write(ctx, data);
1064 spu_release(ctx);
1065
1066 return 4;
1067 }
1068
1069 static int
1070 spufs_signal1_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1071 {
1072 #if SPUFS_SIGNAL_MAP_SIZE == 0x1000
1073 return spufs_ps_fault(vma, vmf, 0x14000, SPUFS_SIGNAL_MAP_SIZE);
1074 #elif SPUFS_SIGNAL_MAP_SIZE == 0x10000
1075 /* For 64k pages, both signal1 and signal2 can be used to mmap the whole
1076 * signal 1 and 2 area
1077 */
1078 return spufs_ps_fault(vma, vmf, 0x10000, SPUFS_SIGNAL_MAP_SIZE);
1079 #else
1080 #error unsupported page size
1081 #endif
1082 }
1083
1084 static const struct vm_operations_struct spufs_signal1_mmap_vmops = {
1085 .fault = spufs_signal1_mmap_fault,
1086 };
1087
1088 static int spufs_signal1_mmap(struct file *file, struct vm_area_struct *vma)
1089 {
1090 if (!(vma->vm_flags & VM_SHARED))
1091 return -EINVAL;
1092
1093 vma->vm_flags |= VM_IO | VM_PFNMAP;
1094 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1095
1096 vma->vm_ops = &spufs_signal1_mmap_vmops;
1097 return 0;
1098 }
1099
1100 static const struct file_operations spufs_signal1_fops = {
1101 .open = spufs_signal1_open,
1102 .release = spufs_signal1_release,
1103 .read = spufs_signal1_read,
1104 .write = spufs_signal1_write,
1105 .mmap = spufs_signal1_mmap,
1106 .llseek = no_llseek,
1107 };
1108
1109 static const struct file_operations spufs_signal1_nosched_fops = {
1110 .open = spufs_signal1_open,
1111 .release = spufs_signal1_release,
1112 .write = spufs_signal1_write,
1113 .mmap = spufs_signal1_mmap,
1114 .llseek = no_llseek,
1115 };
1116
1117 static int spufs_signal2_open(struct inode *inode, struct file *file)
1118 {
1119 struct spufs_inode_info *i = SPUFS_I(inode);
1120 struct spu_context *ctx = i->i_ctx;
1121
1122 mutex_lock(&ctx->mapping_lock);
1123 file->private_data = ctx;
1124 if (!i->i_openers++)
1125 ctx->signal2 = inode->i_mapping;
1126 mutex_unlock(&ctx->mapping_lock);
1127 return nonseekable_open(inode, file);
1128 }
1129
1130 static int
1131 spufs_signal2_release(struct inode *inode, struct file *file)
1132 {
1133 struct spufs_inode_info *i = SPUFS_I(inode);
1134 struct spu_context *ctx = i->i_ctx;
1135
1136 mutex_lock(&ctx->mapping_lock);
1137 if (!--i->i_openers)
1138 ctx->signal2 = NULL;
1139 mutex_unlock(&ctx->mapping_lock);
1140 return 0;
1141 }
1142
1143 static ssize_t __spufs_signal2_read(struct spu_context *ctx, char __user *buf,
1144 size_t len, loff_t *pos)
1145 {
1146 int ret = 0;
1147 u32 data;
1148
1149 if (len < 4)
1150 return -EINVAL;
1151
1152 if (ctx->csa.spu_chnlcnt_RW[4]) {
1153 data = ctx->csa.spu_chnldata_RW[4];
1154 ret = 4;
1155 }
1156
1157 if (!ret)
1158 goto out;
1159
1160 if (copy_to_user(buf, &data, 4))
1161 return -EFAULT;
1162
1163 out:
1164 return ret;
1165 }
1166
1167 static ssize_t spufs_signal2_read(struct file *file, char __user *buf,
1168 size_t len, loff_t *pos)
1169 {
1170 struct spu_context *ctx = file->private_data;
1171 int ret;
1172
1173 ret = spu_acquire_saved(ctx);
1174 if (ret)
1175 return ret;
1176 ret = __spufs_signal2_read(ctx, buf, len, pos);
1177 spu_release_saved(ctx);
1178
1179 return ret;
1180 }
1181
1182 static ssize_t spufs_signal2_write(struct file *file, const char __user *buf,
1183 size_t len, loff_t *pos)
1184 {
1185 struct spu_context *ctx;
1186 ssize_t ret;
1187 u32 data;
1188
1189 ctx = file->private_data;
1190
1191 if (len < 4)
1192 return -EINVAL;
1193
1194 if (copy_from_user(&data, buf, 4))
1195 return -EFAULT;
1196
1197 ret = spu_acquire(ctx);
1198 if (ret)
1199 return ret;
1200 ctx->ops->signal2_write(ctx, data);
1201 spu_release(ctx);
1202
1203 return 4;
1204 }
1205
1206 #if SPUFS_MMAP_4K
1207 static int
1208 spufs_signal2_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1209 {
1210 #if SPUFS_SIGNAL_MAP_SIZE == 0x1000
1211 return spufs_ps_fault(vma, vmf, 0x1c000, SPUFS_SIGNAL_MAP_SIZE);
1212 #elif SPUFS_SIGNAL_MAP_SIZE == 0x10000
1213 /* For 64k pages, both signal1 and signal2 can be used to mmap the whole
1214 * signal 1 and 2 area
1215 */
1216 return spufs_ps_fault(vma, vmf, 0x10000, SPUFS_SIGNAL_MAP_SIZE);
1217 #else
1218 #error unsupported page size
1219 #endif
1220 }
1221
1222 static const struct vm_operations_struct spufs_signal2_mmap_vmops = {
1223 .fault = spufs_signal2_mmap_fault,
1224 };
1225
1226 static int spufs_signal2_mmap(struct file *file, struct vm_area_struct *vma)
1227 {
1228 if (!(vma->vm_flags & VM_SHARED))
1229 return -EINVAL;
1230
1231 vma->vm_flags |= VM_IO | VM_PFNMAP;
1232 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1233
1234 vma->vm_ops = &spufs_signal2_mmap_vmops;
1235 return 0;
1236 }
1237 #else /* SPUFS_MMAP_4K */
1238 #define spufs_signal2_mmap NULL
1239 #endif /* !SPUFS_MMAP_4K */
1240
1241 static const struct file_operations spufs_signal2_fops = {
1242 .open = spufs_signal2_open,
1243 .release = spufs_signal2_release,
1244 .read = spufs_signal2_read,
1245 .write = spufs_signal2_write,
1246 .mmap = spufs_signal2_mmap,
1247 .llseek = no_llseek,
1248 };
1249
1250 static const struct file_operations spufs_signal2_nosched_fops = {
1251 .open = spufs_signal2_open,
1252 .release = spufs_signal2_release,
1253 .write = spufs_signal2_write,
1254 .mmap = spufs_signal2_mmap,
1255 .llseek = no_llseek,
1256 };
1257
1258 /*
1259 * This is a wrapper around DEFINE_SIMPLE_ATTRIBUTE which does the
1260 * work of acquiring (or not) the SPU context before calling through
1261 * to the actual get routine. The set routine is called directly.
1262 */
1263 #define SPU_ATTR_NOACQUIRE 0
1264 #define SPU_ATTR_ACQUIRE 1
1265 #define SPU_ATTR_ACQUIRE_SAVED 2
1266
1267 #define DEFINE_SPUFS_ATTRIBUTE(__name, __get, __set, __fmt, __acquire) \
1268 static int __##__get(void *data, u64 *val) \
1269 { \
1270 struct spu_context *ctx = data; \
1271 int ret = 0; \
1272 \
1273 if (__acquire == SPU_ATTR_ACQUIRE) { \
1274 ret = spu_acquire(ctx); \
1275 if (ret) \
1276 return ret; \
1277 *val = __get(ctx); \
1278 spu_release(ctx); \
1279 } else if (__acquire == SPU_ATTR_ACQUIRE_SAVED) { \
1280 ret = spu_acquire_saved(ctx); \
1281 if (ret) \
1282 return ret; \
1283 *val = __get(ctx); \
1284 spu_release_saved(ctx); \
1285 } else \
1286 *val = __get(ctx); \
1287 \
1288 return 0; \
1289 } \
1290 DEFINE_SPUFS_SIMPLE_ATTRIBUTE(__name, __##__get, __set, __fmt);
1291
1292 static int spufs_signal1_type_set(void *data, u64 val)
1293 {
1294 struct spu_context *ctx = data;
1295 int ret;
1296
1297 ret = spu_acquire(ctx);
1298 if (ret)
1299 return ret;
1300 ctx->ops->signal1_type_set(ctx, val);
1301 spu_release(ctx);
1302
1303 return 0;
1304 }
1305
1306 static u64 spufs_signal1_type_get(struct spu_context *ctx)
1307 {
1308 return ctx->ops->signal1_type_get(ctx);
1309 }
1310 DEFINE_SPUFS_ATTRIBUTE(spufs_signal1_type, spufs_signal1_type_get,
1311 spufs_signal1_type_set, "%llu\n", SPU_ATTR_ACQUIRE);
1312
1313
1314 static int spufs_signal2_type_set(void *data, u64 val)
1315 {
1316 struct spu_context *ctx = data;
1317 int ret;
1318
1319 ret = spu_acquire(ctx);
1320 if (ret)
1321 return ret;
1322 ctx->ops->signal2_type_set(ctx, val);
1323 spu_release(ctx);
1324
1325 return 0;
1326 }
1327
1328 static u64 spufs_signal2_type_get(struct spu_context *ctx)
1329 {
1330 return ctx->ops->signal2_type_get(ctx);
1331 }
1332 DEFINE_SPUFS_ATTRIBUTE(spufs_signal2_type, spufs_signal2_type_get,
1333 spufs_signal2_type_set, "%llu\n", SPU_ATTR_ACQUIRE);
1334
1335 #if SPUFS_MMAP_4K
1336 static int
1337 spufs_mss_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1338 {
1339 return spufs_ps_fault(vma, vmf, 0x0000, SPUFS_MSS_MAP_SIZE);
1340 }
1341
1342 static const struct vm_operations_struct spufs_mss_mmap_vmops = {
1343 .fault = spufs_mss_mmap_fault,
1344 };
1345
1346 /*
1347 * mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
1348 */
1349 static int spufs_mss_mmap(struct file *file, struct vm_area_struct *vma)
1350 {
1351 if (!(vma->vm_flags & VM_SHARED))
1352 return -EINVAL;
1353
1354 vma->vm_flags |= VM_IO | VM_PFNMAP;
1355 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1356
1357 vma->vm_ops = &spufs_mss_mmap_vmops;
1358 return 0;
1359 }
1360 #else /* SPUFS_MMAP_4K */
1361 #define spufs_mss_mmap NULL
1362 #endif /* !SPUFS_MMAP_4K */
1363
1364 static int spufs_mss_open(struct inode *inode, struct file *file)
1365 {
1366 struct spufs_inode_info *i = SPUFS_I(inode);
1367 struct spu_context *ctx = i->i_ctx;
1368
1369 file->private_data = i->i_ctx;
1370
1371 mutex_lock(&ctx->mapping_lock);
1372 if (!i->i_openers++)
1373 ctx->mss = inode->i_mapping;
1374 mutex_unlock(&ctx->mapping_lock);
1375 return nonseekable_open(inode, file);
1376 }
1377
1378 static int
1379 spufs_mss_release(struct inode *inode, struct file *file)
1380 {
1381 struct spufs_inode_info *i = SPUFS_I(inode);
1382 struct spu_context *ctx = i->i_ctx;
1383
1384 mutex_lock(&ctx->mapping_lock);
1385 if (!--i->i_openers)
1386 ctx->mss = NULL;
1387 mutex_unlock(&ctx->mapping_lock);
1388 return 0;
1389 }
1390
1391 static const struct file_operations spufs_mss_fops = {
1392 .open = spufs_mss_open,
1393 .release = spufs_mss_release,
1394 .mmap = spufs_mss_mmap,
1395 .llseek = no_llseek,
1396 };
1397
1398 static int
1399 spufs_psmap_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1400 {
1401 return spufs_ps_fault(vma, vmf, 0x0000, SPUFS_PS_MAP_SIZE);
1402 }
1403
1404 static const struct vm_operations_struct spufs_psmap_mmap_vmops = {
1405 .fault = spufs_psmap_mmap_fault,
1406 };
1407
1408 /*
1409 * mmap support for full problem state area [0x00000 - 0x1ffff].
1410 */
1411 static int spufs_psmap_mmap(struct file *file, struct vm_area_struct *vma)
1412 {
1413 if (!(vma->vm_flags & VM_SHARED))
1414 return -EINVAL;
1415
1416 vma->vm_flags |= VM_IO | VM_PFNMAP;
1417 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1418
1419 vma->vm_ops = &spufs_psmap_mmap_vmops;
1420 return 0;
1421 }
1422
1423 static int spufs_psmap_open(struct inode *inode, struct file *file)
1424 {
1425 struct spufs_inode_info *i = SPUFS_I(inode);
1426 struct spu_context *ctx = i->i_ctx;
1427
1428 mutex_lock(&ctx->mapping_lock);
1429 file->private_data = i->i_ctx;
1430 if (!i->i_openers++)
1431 ctx->psmap = inode->i_mapping;
1432 mutex_unlock(&ctx->mapping_lock);
1433 return nonseekable_open(inode, file);
1434 }
1435
1436 static int
1437 spufs_psmap_release(struct inode *inode, struct file *file)
1438 {
1439 struct spufs_inode_info *i = SPUFS_I(inode);
1440 struct spu_context *ctx = i->i_ctx;
1441
1442 mutex_lock(&ctx->mapping_lock);
1443 if (!--i->i_openers)
1444 ctx->psmap = NULL;
1445 mutex_unlock(&ctx->mapping_lock);
1446 return 0;
1447 }
1448
1449 static const struct file_operations spufs_psmap_fops = {
1450 .open = spufs_psmap_open,
1451 .release = spufs_psmap_release,
1452 .mmap = spufs_psmap_mmap,
1453 .llseek = no_llseek,
1454 };
1455
1456
1457 #if SPUFS_MMAP_4K
1458 static int
1459 spufs_mfc_mmap_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1460 {
1461 return spufs_ps_fault(vma, vmf, 0x3000, SPUFS_MFC_MAP_SIZE);
1462 }
1463
1464 static const struct vm_operations_struct spufs_mfc_mmap_vmops = {
1465 .fault = spufs_mfc_mmap_fault,
1466 };
1467
1468 /*
1469 * mmap support for problem state MFC DMA area [0x0000 - 0x0fff].
1470 */
1471 static int spufs_mfc_mmap(struct file *file, struct vm_area_struct *vma)
1472 {
1473 if (!(vma->vm_flags & VM_SHARED))
1474 return -EINVAL;
1475
1476 vma->vm_flags |= VM_IO | VM_PFNMAP;
1477 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1478
1479 vma->vm_ops = &spufs_mfc_mmap_vmops;
1480 return 0;
1481 }
1482 #else /* SPUFS_MMAP_4K */
1483 #define spufs_mfc_mmap NULL
1484 #endif /* !SPUFS_MMAP_4K */
1485
1486 static int spufs_mfc_open(struct inode *inode, struct file *file)
1487 {
1488 struct spufs_inode_info *i = SPUFS_I(inode);
1489 struct spu_context *ctx = i->i_ctx;
1490
1491 /* we don't want to deal with DMA into other processes */
1492 if (ctx->owner != current->mm)
1493 return -EINVAL;
1494
1495 if (atomic_read(&inode->i_count) != 1)
1496 return -EBUSY;
1497
1498 mutex_lock(&ctx->mapping_lock);
1499 file->private_data = ctx;
1500 if (!i->i_openers++)
1501 ctx->mfc = inode->i_mapping;
1502 mutex_unlock(&ctx->mapping_lock);
1503 return nonseekable_open(inode, file);
1504 }
1505
1506 static int
1507 spufs_mfc_release(struct inode *inode, struct file *file)
1508 {
1509 struct spufs_inode_info *i = SPUFS_I(inode);
1510 struct spu_context *ctx = i->i_ctx;
1511
1512 mutex_lock(&ctx->mapping_lock);
1513 if (!--i->i_openers)
1514 ctx->mfc = NULL;
1515 mutex_unlock(&ctx->mapping_lock);
1516 return 0;
1517 }
1518
1519 /* interrupt-level mfc callback function. */
1520 void spufs_mfc_callback(struct spu *spu)
1521 {
1522 struct spu_context *ctx = spu->ctx;
1523
1524 if (!ctx)
1525 return;
1526
1527 wake_up_all(&ctx->mfc_wq);
1528
1529 pr_debug("%s %s\n", __func__, spu->name);
1530 if (ctx->mfc_fasync) {
1531 u32 free_elements, tagstatus;
1532 unsigned int mask;
1533
1534 /* no need for spu_acquire in interrupt context */
1535 free_elements = ctx->ops->get_mfc_free_elements(ctx);
1536 tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
1537
1538 mask = 0;
1539 if (free_elements & 0xffff)
1540 mask |= POLLOUT;
1541 if (tagstatus & ctx->tagwait)
1542 mask |= POLLIN;
1543
1544 kill_fasync(&ctx->mfc_fasync, SIGIO, mask);
1545 }
1546 }
1547
1548 static int spufs_read_mfc_tagstatus(struct spu_context *ctx, u32 *status)
1549 {
1550 /* See if there is one tag group is complete */
1551 /* FIXME we need locking around tagwait */
1552 *status = ctx->ops->read_mfc_tagstatus(ctx) & ctx->tagwait;
1553 ctx->tagwait &= ~*status;
1554 if (*status)
1555 return 1;
1556
1557 /* enable interrupt waiting for any tag group,
1558 may silently fail if interrupts are already enabled */
1559 ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1);
1560 return 0;
1561 }
1562
1563 static ssize_t spufs_mfc_read(struct file *file, char __user *buffer,
1564 size_t size, loff_t *pos)
1565 {
1566 struct spu_context *ctx = file->private_data;
1567 int ret = -EINVAL;
1568 u32 status;
1569
1570 if (size != 4)
1571 goto out;
1572
1573 ret = spu_acquire(ctx);
1574 if (ret)
1575 return ret;
1576
1577 ret = -EINVAL;
1578 if (file->f_flags & O_NONBLOCK) {
1579 status = ctx->ops->read_mfc_tagstatus(ctx);
1580 if (!(status & ctx->tagwait))
1581 ret = -EAGAIN;
1582 else
1583 /* XXX(hch): shouldn't we clear ret here? */
1584 ctx->tagwait &= ~status;
1585 } else {
1586 ret = spufs_wait(ctx->mfc_wq,
1587 spufs_read_mfc_tagstatus(ctx, &status));
1588 if (ret)
1589 goto out;
1590 }
1591 spu_release(ctx);
1592
1593 ret = 4;
1594 if (copy_to_user(buffer, &status, 4))
1595 ret = -EFAULT;
1596
1597 out:
1598 return ret;
1599 }
1600
1601 static int spufs_check_valid_dma(struct mfc_dma_command *cmd)
1602 {
1603 pr_debug("queueing DMA %x %llx %x %x %x\n", cmd->lsa,
1604 cmd->ea, cmd->size, cmd->tag, cmd->cmd);
1605
1606 switch (cmd->cmd) {
1607 case MFC_PUT_CMD:
1608 case MFC_PUTF_CMD:
1609 case MFC_PUTB_CMD:
1610 case MFC_GET_CMD:
1611 case MFC_GETF_CMD:
1612 case MFC_GETB_CMD:
1613 break;
1614 default:
1615 pr_debug("invalid DMA opcode %x\n", cmd->cmd);
1616 return -EIO;
1617 }
1618
1619 if ((cmd->lsa & 0xf) != (cmd->ea &0xf)) {
1620 pr_debug("invalid DMA alignment, ea %llx lsa %x\n",
1621 cmd->ea, cmd->lsa);
1622 return -EIO;
1623 }
1624
1625 switch (cmd->size & 0xf) {
1626 case 1:
1627 break;
1628 case 2:
1629 if (cmd->lsa & 1)
1630 goto error;
1631 break;
1632 case 4:
1633 if (cmd->lsa & 3)
1634 goto error;
1635 break;
1636 case 8:
1637 if (cmd->lsa & 7)
1638 goto error;
1639 break;
1640 case 0:
1641 if (cmd->lsa & 15)
1642 goto error;
1643 break;
1644 error:
1645 default:
1646 pr_debug("invalid DMA alignment %x for size %x\n",
1647 cmd->lsa & 0xf, cmd->size);
1648 return -EIO;
1649 }
1650
1651 if (cmd->size > 16 * 1024) {
1652 pr_debug("invalid DMA size %x\n", cmd->size);
1653 return -EIO;
1654 }
1655
1656 if (cmd->tag & 0xfff0) {
1657 /* we reserve the higher tag numbers for kernel use */
1658 pr_debug("invalid DMA tag\n");
1659 return -EIO;
1660 }
1661
1662 if (cmd->class) {
1663 /* not supported in this version */
1664 pr_debug("invalid DMA class\n");
1665 return -EIO;
1666 }
1667
1668 return 0;
1669 }
1670
1671 static int spu_send_mfc_command(struct spu_context *ctx,
1672 struct mfc_dma_command cmd,
1673 int *error)
1674 {
1675 *error = ctx->ops->send_mfc_command(ctx, &cmd);
1676 if (*error == -EAGAIN) {
1677 /* wait for any tag group to complete
1678 so we have space for the new command */
1679 ctx->ops->set_mfc_query(ctx, ctx->tagwait, 1);
1680 /* try again, because the queue might be
1681 empty again */
1682 *error = ctx->ops->send_mfc_command(ctx, &cmd);
1683 if (*error == -EAGAIN)
1684 return 0;
1685 }
1686 return 1;
1687 }
1688
1689 static ssize_t spufs_mfc_write(struct file *file, const char __user *buffer,
1690 size_t size, loff_t *pos)
1691 {
1692 struct spu_context *ctx = file->private_data;
1693 struct mfc_dma_command cmd;
1694 int ret = -EINVAL;
1695
1696 if (size != sizeof cmd)
1697 goto out;
1698
1699 ret = -EFAULT;
1700 if (copy_from_user(&cmd, buffer, sizeof cmd))
1701 goto out;
1702
1703 ret = spufs_check_valid_dma(&cmd);
1704 if (ret)
1705 goto out;
1706
1707 ret = spu_acquire(ctx);
1708 if (ret)
1709 goto out;
1710
1711 ret = spufs_wait(ctx->run_wq, ctx->state == SPU_STATE_RUNNABLE);
1712 if (ret)
1713 goto out;
1714
1715 if (file->f_flags & O_NONBLOCK) {
1716 ret = ctx->ops->send_mfc_command(ctx, &cmd);
1717 } else {
1718 int status;
1719 ret = spufs_wait(ctx->mfc_wq,
1720 spu_send_mfc_command(ctx, cmd, &status));
1721 if (ret)
1722 goto out;
1723 if (status)
1724 ret = status;
1725 }
1726
1727 if (ret)
1728 goto out_unlock;
1729
1730 ctx->tagwait |= 1 << cmd.tag;
1731 ret = size;
1732
1733 out_unlock:
1734 spu_release(ctx);
1735 out:
1736 return ret;
1737 }
1738
1739 static unsigned int spufs_mfc_poll(struct file *file,poll_table *wait)
1740 {
1741 struct spu_context *ctx = file->private_data;
1742 u32 free_elements, tagstatus;
1743 unsigned int mask;
1744
1745 poll_wait(file, &ctx->mfc_wq, wait);
1746
1747 /*
1748 * For now keep this uninterruptible and also ignore the rule
1749 * that poll should not sleep. Will be fixed later.
1750 */
1751 mutex_lock(&ctx->state_mutex);
1752 ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2);
1753 free_elements = ctx->ops->get_mfc_free_elements(ctx);
1754 tagstatus = ctx->ops->read_mfc_tagstatus(ctx);
1755 spu_release(ctx);
1756
1757 mask = 0;
1758 if (free_elements & 0xffff)
1759 mask |= POLLOUT | POLLWRNORM;
1760 if (tagstatus & ctx->tagwait)
1761 mask |= POLLIN | POLLRDNORM;
1762
1763 pr_debug("%s: free %d tagstatus %d tagwait %d\n", __func__,
1764 free_elements, tagstatus, ctx->tagwait);
1765
1766 return mask;
1767 }
1768
1769 static int spufs_mfc_flush(struct file *file, fl_owner_t id)
1770 {
1771 struct spu_context *ctx = file->private_data;
1772 int ret;
1773
1774 ret = spu_acquire(ctx);
1775 if (ret)
1776 goto out;
1777 #if 0
1778 /* this currently hangs */
1779 ret = spufs_wait(ctx->mfc_wq,
1780 ctx->ops->set_mfc_query(ctx, ctx->tagwait, 2));
1781 if (ret)
1782 goto out;
1783 ret = spufs_wait(ctx->mfc_wq,
1784 ctx->ops->read_mfc_tagstatus(ctx) == ctx->tagwait);
1785 if (ret)
1786 goto out;
1787 #else
1788 ret = 0;
1789 #endif
1790 spu_release(ctx);
1791 out:
1792 return ret;
1793 }
1794
1795 static int spufs_mfc_fsync(struct file *file, loff_t start, loff_t end, int datasync)
1796 {
1797 struct inode *inode = file_inode(file);
1798 int err = filemap_write_and_wait_range(inode->i_mapping, start, end);
1799 if (!err) {
1800 inode_lock(inode);
1801 err = spufs_mfc_flush(file, NULL);
1802 inode_unlock(inode);
1803 }
1804 return err;
1805 }
1806
1807 static int spufs_mfc_fasync(int fd, struct file *file, int on)
1808 {
1809 struct spu_context *ctx = file->private_data;
1810
1811 return fasync_helper(fd, file, on, &ctx->mfc_fasync);
1812 }
1813
1814 static const struct file_operations spufs_mfc_fops = {
1815 .open = spufs_mfc_open,
1816 .release = spufs_mfc_release,
1817 .read = spufs_mfc_read,
1818 .write = spufs_mfc_write,
1819 .poll = spufs_mfc_poll,
1820 .flush = spufs_mfc_flush,
1821 .fsync = spufs_mfc_fsync,
1822 .fasync = spufs_mfc_fasync,
1823 .mmap = spufs_mfc_mmap,
1824 .llseek = no_llseek,
1825 };
1826
1827 static int spufs_npc_set(void *data, u64 val)
1828 {
1829 struct spu_context *ctx = data;
1830 int ret;
1831
1832 ret = spu_acquire(ctx);
1833 if (ret)
1834 return ret;
1835 ctx->ops->npc_write(ctx, val);
1836 spu_release(ctx);
1837
1838 return 0;
1839 }
1840
1841 static u64 spufs_npc_get(struct spu_context *ctx)
1842 {
1843 return ctx->ops->npc_read(ctx);
1844 }
1845 DEFINE_SPUFS_ATTRIBUTE(spufs_npc_ops, spufs_npc_get, spufs_npc_set,
1846 "0x%llx\n", SPU_ATTR_ACQUIRE);
1847
1848 static int spufs_decr_set(void *data, u64 val)
1849 {
1850 struct spu_context *ctx = data;
1851 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1852 int ret;
1853
1854 ret = spu_acquire_saved(ctx);
1855 if (ret)
1856 return ret;
1857 lscsa->decr.slot[0] = (u32) val;
1858 spu_release_saved(ctx);
1859
1860 return 0;
1861 }
1862
1863 static u64 spufs_decr_get(struct spu_context *ctx)
1864 {
1865 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1866 return lscsa->decr.slot[0];
1867 }
1868 DEFINE_SPUFS_ATTRIBUTE(spufs_decr_ops, spufs_decr_get, spufs_decr_set,
1869 "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED);
1870
1871 static int spufs_decr_status_set(void *data, u64 val)
1872 {
1873 struct spu_context *ctx = data;
1874 int ret;
1875
1876 ret = spu_acquire_saved(ctx);
1877 if (ret)
1878 return ret;
1879 if (val)
1880 ctx->csa.priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING;
1881 else
1882 ctx->csa.priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING;
1883 spu_release_saved(ctx);
1884
1885 return 0;
1886 }
1887
1888 static u64 spufs_decr_status_get(struct spu_context *ctx)
1889 {
1890 if (ctx->csa.priv2.mfc_control_RW & MFC_CNTL_DECREMENTER_RUNNING)
1891 return SPU_DECR_STATUS_RUNNING;
1892 else
1893 return 0;
1894 }
1895 DEFINE_SPUFS_ATTRIBUTE(spufs_decr_status_ops, spufs_decr_status_get,
1896 spufs_decr_status_set, "0x%llx\n",
1897 SPU_ATTR_ACQUIRE_SAVED);
1898
1899 static int spufs_event_mask_set(void *data, u64 val)
1900 {
1901 struct spu_context *ctx = data;
1902 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1903 int ret;
1904
1905 ret = spu_acquire_saved(ctx);
1906 if (ret)
1907 return ret;
1908 lscsa->event_mask.slot[0] = (u32) val;
1909 spu_release_saved(ctx);
1910
1911 return 0;
1912 }
1913
1914 static u64 spufs_event_mask_get(struct spu_context *ctx)
1915 {
1916 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1917 return lscsa->event_mask.slot[0];
1918 }
1919
1920 DEFINE_SPUFS_ATTRIBUTE(spufs_event_mask_ops, spufs_event_mask_get,
1921 spufs_event_mask_set, "0x%llx\n",
1922 SPU_ATTR_ACQUIRE_SAVED);
1923
1924 static u64 spufs_event_status_get(struct spu_context *ctx)
1925 {
1926 struct spu_state *state = &ctx->csa;
1927 u64 stat;
1928 stat = state->spu_chnlcnt_RW[0];
1929 if (stat)
1930 return state->spu_chnldata_RW[0];
1931 return 0;
1932 }
1933 DEFINE_SPUFS_ATTRIBUTE(spufs_event_status_ops, spufs_event_status_get,
1934 NULL, "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED)
1935
1936 static int spufs_srr0_set(void *data, u64 val)
1937 {
1938 struct spu_context *ctx = data;
1939 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1940 int ret;
1941
1942 ret = spu_acquire_saved(ctx);
1943 if (ret)
1944 return ret;
1945 lscsa->srr0.slot[0] = (u32) val;
1946 spu_release_saved(ctx);
1947
1948 return 0;
1949 }
1950
1951 static u64 spufs_srr0_get(struct spu_context *ctx)
1952 {
1953 struct spu_lscsa *lscsa = ctx->csa.lscsa;
1954 return lscsa->srr0.slot[0];
1955 }
1956 DEFINE_SPUFS_ATTRIBUTE(spufs_srr0_ops, spufs_srr0_get, spufs_srr0_set,
1957 "0x%llx\n", SPU_ATTR_ACQUIRE_SAVED)
1958
1959 static u64 spufs_id_get(struct spu_context *ctx)
1960 {
1961 u64 num;
1962
1963 if (ctx->state == SPU_STATE_RUNNABLE)
1964 num = ctx->spu->number;
1965 else
1966 num = (unsigned int)-1;
1967
1968 return num;
1969 }
1970 DEFINE_SPUFS_ATTRIBUTE(spufs_id_ops, spufs_id_get, NULL, "0x%llx\n",
1971 SPU_ATTR_ACQUIRE)
1972
1973 static u64 spufs_object_id_get(struct spu_context *ctx)
1974 {
1975 /* FIXME: Should there really be no locking here? */
1976 return ctx->object_id;
1977 }
1978
1979 static int spufs_object_id_set(void *data, u64 id)
1980 {
1981 struct spu_context *ctx = data;
1982 ctx->object_id = id;
1983
1984 return 0;
1985 }
1986
1987 DEFINE_SPUFS_ATTRIBUTE(spufs_object_id_ops, spufs_object_id_get,
1988 spufs_object_id_set, "0x%llx\n", SPU_ATTR_NOACQUIRE);
1989
1990 static u64 spufs_lslr_get(struct spu_context *ctx)
1991 {
1992 return ctx->csa.priv2.spu_lslr_RW;
1993 }
1994 DEFINE_SPUFS_ATTRIBUTE(spufs_lslr_ops, spufs_lslr_get, NULL, "0x%llx\n",
1995 SPU_ATTR_ACQUIRE_SAVED);
1996
1997 static int spufs_info_open(struct inode *inode, struct file *file)
1998 {
1999 struct spufs_inode_info *i = SPUFS_I(inode);
2000 struct spu_context *ctx = i->i_ctx;
2001 file->private_data = ctx;
2002 return 0;
2003 }
2004
2005 static int spufs_caps_show(struct seq_file *s, void *private)
2006 {
2007 struct spu_context *ctx = s->private;
2008
2009 if (!(ctx->flags & SPU_CREATE_NOSCHED))
2010 seq_puts(s, "sched\n");
2011 if (!(ctx->flags & SPU_CREATE_ISOLATE))
2012 seq_puts(s, "step\n");
2013 return 0;
2014 }
2015
2016 static int spufs_caps_open(struct inode *inode, struct file *file)
2017 {
2018 return single_open(file, spufs_caps_show, SPUFS_I(inode)->i_ctx);
2019 }
2020
2021 static const struct file_operations spufs_caps_fops = {
2022 .open = spufs_caps_open,
2023 .read = seq_read,
2024 .llseek = seq_lseek,
2025 .release = single_release,
2026 };
2027
2028 static ssize_t __spufs_mbox_info_read(struct spu_context *ctx,
2029 char __user *buf, size_t len, loff_t *pos)
2030 {
2031 u32 data;
2032
2033 /* EOF if there's no entry in the mbox */
2034 if (!(ctx->csa.prob.mb_stat_R & 0x0000ff))
2035 return 0;
2036
2037 data = ctx->csa.prob.pu_mb_R;
2038
2039 return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
2040 }
2041
2042 static ssize_t spufs_mbox_info_read(struct file *file, char __user *buf,
2043 size_t len, loff_t *pos)
2044 {
2045 int ret;
2046 struct spu_context *ctx = file->private_data;
2047
2048 if (!access_ok(VERIFY_WRITE, buf, len))
2049 return -EFAULT;
2050
2051 ret = spu_acquire_saved(ctx);
2052 if (ret)
2053 return ret;
2054 spin_lock(&ctx->csa.register_lock);
2055 ret = __spufs_mbox_info_read(ctx, buf, len, pos);
2056 spin_unlock(&ctx->csa.register_lock);
2057 spu_release_saved(ctx);
2058
2059 return ret;
2060 }
2061
2062 static const struct file_operations spufs_mbox_info_fops = {
2063 .open = spufs_info_open,
2064 .read = spufs_mbox_info_read,
2065 .llseek = generic_file_llseek,
2066 };
2067
2068 static ssize_t __spufs_ibox_info_read(struct spu_context *ctx,
2069 char __user *buf, size_t len, loff_t *pos)
2070 {
2071 u32 data;
2072
2073 /* EOF if there's no entry in the ibox */
2074 if (!(ctx->csa.prob.mb_stat_R & 0xff0000))
2075 return 0;
2076
2077 data = ctx->csa.priv2.puint_mb_R;
2078
2079 return simple_read_from_buffer(buf, len, pos, &data, sizeof data);
2080 }
2081
2082 static ssize_t spufs_ibox_info_read(struct file *file, char __user *buf,
2083 size_t len, loff_t *pos)
2084 {
2085 struct spu_context *ctx = file->private_data;
2086 int ret;
2087
2088 if (!access_ok(VERIFY_WRITE, buf, len))
2089 return -EFAULT;
2090
2091 ret = spu_acquire_saved(ctx);
2092 if (ret)
2093 return ret;
2094 spin_lock(&ctx->csa.register_lock);
2095 ret = __spufs_ibox_info_read(ctx, buf, len, pos);
2096 spin_unlock(&ctx->csa.register_lock);
2097 spu_release_saved(ctx);
2098
2099 return ret;
2100 }
2101
2102 static const struct file_operations spufs_ibox_info_fops = {
2103 .open = spufs_info_open,
2104 .read = spufs_ibox_info_read,
2105 .llseek = generic_file_llseek,
2106 };
2107
2108 static ssize_t __spufs_wbox_info_read(struct spu_context *ctx,
2109 char __user *buf, size_t len, loff_t *pos)
2110 {
2111 int i, cnt;
2112 u32 data[4];
2113 u32 wbox_stat;
2114
2115 wbox_stat = ctx->csa.prob.mb_stat_R;
2116 cnt = 4 - ((wbox_stat & 0x00ff00) >> 8);
2117 for (i = 0; i < cnt; i++) {
2118 data[i] = ctx->csa.spu_mailbox_data[i];
2119 }
2120
2121 return simple_read_from_buffer(buf, len, pos, &data,
2122 cnt * sizeof(u32));
2123 }
2124
2125 static ssize_t spufs_wbox_info_read(struct file *file, char __user *buf,
2126 size_t len, loff_t *pos)
2127 {
2128 struct spu_context *ctx = file->private_data;
2129 int ret;
2130
2131 if (!access_ok(VERIFY_WRITE, buf, len))
2132 return -EFAULT;
2133
2134 ret = spu_acquire_saved(ctx);
2135 if (ret)
2136 return ret;
2137 spin_lock(&ctx->csa.register_lock);
2138 ret = __spufs_wbox_info_read(ctx, buf, len, pos);
2139 spin_unlock(&ctx->csa.register_lock);
2140 spu_release_saved(ctx);
2141
2142 return ret;
2143 }
2144
2145 static const struct file_operations spufs_wbox_info_fops = {
2146 .open = spufs_info_open,
2147 .read = spufs_wbox_info_read,
2148 .llseek = generic_file_llseek,
2149 };
2150
2151 static ssize_t __spufs_dma_info_read(struct spu_context *ctx,
2152 char __user *buf, size_t len, loff_t *pos)
2153 {
2154 struct spu_dma_info info;
2155 struct mfc_cq_sr *qp, *spuqp;
2156 int i;
2157
2158 info.dma_info_type = ctx->csa.priv2.spu_tag_status_query_RW;
2159 info.dma_info_mask = ctx->csa.lscsa->tag_mask.slot[0];
2160 info.dma_info_status = ctx->csa.spu_chnldata_RW[24];
2161 info.dma_info_stall_and_notify = ctx->csa.spu_chnldata_RW[25];
2162 info.dma_info_atomic_command_status = ctx->csa.spu_chnldata_RW[27];
2163 for (i = 0; i < 16; i++) {
2164 qp = &info.dma_info_command_data[i];
2165 spuqp = &ctx->csa.priv2.spuq[i];
2166
2167 qp->mfc_cq_data0_RW = spuqp->mfc_cq_data0_RW;
2168 qp->mfc_cq_data1_RW = spuqp->mfc_cq_data1_RW;
2169 qp->mfc_cq_data2_RW = spuqp->mfc_cq_data2_RW;
2170 qp->mfc_cq_data3_RW = spuqp->mfc_cq_data3_RW;
2171 }
2172
2173 return simple_read_from_buffer(buf, len, pos, &info,
2174 sizeof info);
2175 }
2176
2177 static ssize_t spufs_dma_info_read(struct file *file, char __user *buf,
2178 size_t len, loff_t *pos)
2179 {
2180 struct spu_context *ctx = file->private_data;
2181 int ret;
2182
2183 if (!access_ok(VERIFY_WRITE, buf, len))
2184 return -EFAULT;
2185
2186 ret = spu_acquire_saved(ctx);
2187 if (ret)
2188 return ret;
2189 spin_lock(&ctx->csa.register_lock);
2190 ret = __spufs_dma_info_read(ctx, buf, len, pos);
2191 spin_unlock(&ctx->csa.register_lock);
2192 spu_release_saved(ctx);
2193
2194 return ret;
2195 }
2196
2197 static const struct file_operations spufs_dma_info_fops = {
2198 .open = spufs_info_open,
2199 .read = spufs_dma_info_read,
2200 .llseek = no_llseek,
2201 };
2202
2203 static ssize_t __spufs_proxydma_info_read(struct spu_context *ctx,
2204 char __user *buf, size_t len, loff_t *pos)
2205 {
2206 struct spu_proxydma_info info;
2207 struct mfc_cq_sr *qp, *puqp;
2208 int ret = sizeof info;
2209 int i;
2210
2211 if (len < ret)
2212 return -EINVAL;
2213
2214 if (!access_ok(VERIFY_WRITE, buf, len))
2215 return -EFAULT;
2216
2217 info.proxydma_info_type = ctx->csa.prob.dma_querytype_RW;
2218 info.proxydma_info_mask = ctx->csa.prob.dma_querymask_RW;
2219 info.proxydma_info_status = ctx->csa.prob.dma_tagstatus_R;
2220 for (i = 0; i < 8; i++) {
2221 qp = &info.proxydma_info_command_data[i];
2222 puqp = &ctx->csa.priv2.puq[i];
2223
2224 qp->mfc_cq_data0_RW = puqp->mfc_cq_data0_RW;
2225 qp->mfc_cq_data1_RW = puqp->mfc_cq_data1_RW;
2226 qp->mfc_cq_data2_RW = puqp->mfc_cq_data2_RW;
2227 qp->mfc_cq_data3_RW = puqp->mfc_cq_data3_RW;
2228 }
2229
2230 return simple_read_from_buffer(buf, len, pos, &info,
2231 sizeof info);
2232 }
2233
2234 static ssize_t spufs_proxydma_info_read(struct file *file, char __user *buf,
2235 size_t len, loff_t *pos)
2236 {
2237 struct spu_context *ctx = file->private_data;
2238 int ret;
2239
2240 ret = spu_acquire_saved(ctx);
2241 if (ret)
2242 return ret;
2243 spin_lock(&ctx->csa.register_lock);
2244 ret = __spufs_proxydma_info_read(ctx, buf, len, pos);
2245 spin_unlock(&ctx->csa.register_lock);
2246 spu_release_saved(ctx);
2247
2248 return ret;
2249 }
2250
2251 static const struct file_operations spufs_proxydma_info_fops = {
2252 .open = spufs_info_open,
2253 .read = spufs_proxydma_info_read,
2254 .llseek = no_llseek,
2255 };
2256
2257 static int spufs_show_tid(struct seq_file *s, void *private)
2258 {
2259 struct spu_context *ctx = s->private;
2260
2261 seq_printf(s, "%d\n", ctx->tid);
2262 return 0;
2263 }
2264
2265 static int spufs_tid_open(struct inode *inode, struct file *file)
2266 {
2267 return single_open(file, spufs_show_tid, SPUFS_I(inode)->i_ctx);
2268 }
2269
2270 static const struct file_operations spufs_tid_fops = {
2271 .open = spufs_tid_open,
2272 .read = seq_read,
2273 .llseek = seq_lseek,
2274 .release = single_release,
2275 };
2276
2277 static const char *ctx_state_names[] = {
2278 "user", "system", "iowait", "loaded"
2279 };
2280
2281 static unsigned long long spufs_acct_time(struct spu_context *ctx,
2282 enum spu_utilization_state state)
2283 {
2284 unsigned long long time = ctx->stats.times[state];
2285
2286 /*
2287 * In general, utilization statistics are updated by the controlling
2288 * thread as the spu context moves through various well defined
2289 * state transitions, but if the context is lazily loaded its
2290 * utilization statistics are not updated as the controlling thread
2291 * is not tightly coupled with the execution of the spu context. We
2292 * calculate and apply the time delta from the last recorded state
2293 * of the spu context.
2294 */
2295 if (ctx->spu && ctx->stats.util_state == state) {
2296 time += ktime_get_ns() - ctx->stats.tstamp;
2297 }
2298
2299 return time / NSEC_PER_MSEC;
2300 }
2301
2302 static unsigned long long spufs_slb_flts(struct spu_context *ctx)
2303 {
2304 unsigned long long slb_flts = ctx->stats.slb_flt;
2305
2306 if (ctx->state == SPU_STATE_RUNNABLE) {
2307 slb_flts += (ctx->spu->stats.slb_flt -
2308 ctx->stats.slb_flt_base);
2309 }
2310
2311 return slb_flts;
2312 }
2313
2314 static unsigned long long spufs_class2_intrs(struct spu_context *ctx)
2315 {
2316 unsigned long long class2_intrs = ctx->stats.class2_intr;
2317
2318 if (ctx->state == SPU_STATE_RUNNABLE) {
2319 class2_intrs += (ctx->spu->stats.class2_intr -
2320 ctx->stats.class2_intr_base);
2321 }
2322
2323 return class2_intrs;
2324 }
2325
2326
2327 static int spufs_show_stat(struct seq_file *s, void *private)
2328 {
2329 struct spu_context *ctx = s->private;
2330 int ret;
2331
2332 ret = spu_acquire(ctx);
2333 if (ret)
2334 return ret;
2335
2336 seq_printf(s, "%s %llu %llu %llu %llu "
2337 "%llu %llu %llu %llu %llu %llu %llu %llu\n",
2338 ctx_state_names[ctx->stats.util_state],
2339 spufs_acct_time(ctx, SPU_UTIL_USER),
2340 spufs_acct_time(ctx, SPU_UTIL_SYSTEM),
2341 spufs_acct_time(ctx, SPU_UTIL_IOWAIT),
2342 spufs_acct_time(ctx, SPU_UTIL_IDLE_LOADED),
2343 ctx->stats.vol_ctx_switch,
2344 ctx->stats.invol_ctx_switch,
2345 spufs_slb_flts(ctx),
2346 ctx->stats.hash_flt,
2347 ctx->stats.min_flt,
2348 ctx->stats.maj_flt,
2349 spufs_class2_intrs(ctx),
2350 ctx->stats.libassist);
2351 spu_release(ctx);
2352 return 0;
2353 }
2354
2355 static int spufs_stat_open(struct inode *inode, struct file *file)
2356 {
2357 return single_open(file, spufs_show_stat, SPUFS_I(inode)->i_ctx);
2358 }
2359
2360 static const struct file_operations spufs_stat_fops = {
2361 .open = spufs_stat_open,
2362 .read = seq_read,
2363 .llseek = seq_lseek,
2364 .release = single_release,
2365 };
2366
2367 static inline int spufs_switch_log_used(struct spu_context *ctx)
2368 {
2369 return (ctx->switch_log->head - ctx->switch_log->tail) %
2370 SWITCH_LOG_BUFSIZE;
2371 }
2372
2373 static inline int spufs_switch_log_avail(struct spu_context *ctx)
2374 {
2375 return SWITCH_LOG_BUFSIZE - spufs_switch_log_used(ctx);
2376 }
2377
2378 static int spufs_switch_log_open(struct inode *inode, struct file *file)
2379 {
2380 struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
2381 int rc;
2382
2383 rc = spu_acquire(ctx);
2384 if (rc)
2385 return rc;
2386
2387 if (ctx->switch_log) {
2388 rc = -EBUSY;
2389 goto out;
2390 }
2391
2392 ctx->switch_log = kmalloc(sizeof(struct switch_log) +
2393 SWITCH_LOG_BUFSIZE * sizeof(struct switch_log_entry),
2394 GFP_KERNEL);
2395
2396 if (!ctx->switch_log) {
2397 rc = -ENOMEM;
2398 goto out;
2399 }
2400
2401 ctx->switch_log->head = ctx->switch_log->tail = 0;
2402 init_waitqueue_head(&ctx->switch_log->wait);
2403 rc = 0;
2404
2405 out:
2406 spu_release(ctx);
2407 return rc;
2408 }
2409
2410 static int spufs_switch_log_release(struct inode *inode, struct file *file)
2411 {
2412 struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
2413 int rc;
2414
2415 rc = spu_acquire(ctx);
2416 if (rc)
2417 return rc;
2418
2419 kfree(ctx->switch_log);
2420 ctx->switch_log = NULL;
2421 spu_release(ctx);
2422
2423 return 0;
2424 }
2425
2426 static int switch_log_sprint(struct spu_context *ctx, char *tbuf, int n)
2427 {
2428 struct switch_log_entry *p;
2429
2430 p = ctx->switch_log->log + ctx->switch_log->tail % SWITCH_LOG_BUFSIZE;
2431
2432 return snprintf(tbuf, n, "%u.%09u %d %u %u %llu\n",
2433 (unsigned int) p->tstamp.tv_sec,
2434 (unsigned int) p->tstamp.tv_nsec,
2435 p->spu_id,
2436 (unsigned int) p->type,
2437 (unsigned int) p->val,
2438 (unsigned long long) p->timebase);
2439 }
2440
2441 static ssize_t spufs_switch_log_read(struct file *file, char __user *buf,
2442 size_t len, loff_t *ppos)
2443 {
2444 struct inode *inode = file_inode(file);
2445 struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
2446 int error = 0, cnt = 0;
2447
2448 if (!buf)
2449 return -EINVAL;
2450
2451 error = spu_acquire(ctx);
2452 if (error)
2453 return error;
2454
2455 while (cnt < len) {
2456 char tbuf[128];
2457 int width;
2458
2459 if (spufs_switch_log_used(ctx) == 0) {
2460 if (cnt > 0) {
2461 /* If there's data ready to go, we can
2462 * just return straight away */
2463 break;
2464
2465 } else if (file->f_flags & O_NONBLOCK) {
2466 error = -EAGAIN;
2467 break;
2468
2469 } else {
2470 /* spufs_wait will drop the mutex and
2471 * re-acquire, but since we're in read(), the
2472 * file cannot be _released (and so
2473 * ctx->switch_log is stable).
2474 */
2475 error = spufs_wait(ctx->switch_log->wait,
2476 spufs_switch_log_used(ctx) > 0);
2477
2478 /* On error, spufs_wait returns without the
2479 * state mutex held */
2480 if (error)
2481 return error;
2482
2483 /* We may have had entries read from underneath
2484 * us while we dropped the mutex in spufs_wait,
2485 * so re-check */
2486 if (spufs_switch_log_used(ctx) == 0)
2487 continue;
2488 }
2489 }
2490
2491 width = switch_log_sprint(ctx, tbuf, sizeof(tbuf));
2492 if (width < len)
2493 ctx->switch_log->tail =
2494 (ctx->switch_log->tail + 1) %
2495 SWITCH_LOG_BUFSIZE;
2496 else
2497 /* If the record is greater than space available return
2498 * partial buffer (so far) */
2499 break;
2500
2501 error = copy_to_user(buf + cnt, tbuf, width);
2502 if (error)
2503 break;
2504 cnt += width;
2505 }
2506
2507 spu_release(ctx);
2508
2509 return cnt == 0 ? error : cnt;
2510 }
2511
2512 static unsigned int spufs_switch_log_poll(struct file *file, poll_table *wait)
2513 {
2514 struct inode *inode = file_inode(file);
2515 struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
2516 unsigned int mask = 0;
2517 int rc;
2518
2519 poll_wait(file, &ctx->switch_log->wait, wait);
2520
2521 rc = spu_acquire(ctx);
2522 if (rc)
2523 return rc;
2524
2525 if (spufs_switch_log_used(ctx) > 0)
2526 mask |= POLLIN;
2527
2528 spu_release(ctx);
2529
2530 return mask;
2531 }
2532
2533 static const struct file_operations spufs_switch_log_fops = {
2534 .open = spufs_switch_log_open,
2535 .read = spufs_switch_log_read,
2536 .poll = spufs_switch_log_poll,
2537 .release = spufs_switch_log_release,
2538 .llseek = no_llseek,
2539 };
2540
2541 /**
2542 * Log a context switch event to a switch log reader.
2543 *
2544 * Must be called with ctx->state_mutex held.
2545 */
2546 void spu_switch_log_notify(struct spu *spu, struct spu_context *ctx,
2547 u32 type, u32 val)
2548 {
2549 if (!ctx->switch_log)
2550 return;
2551
2552 if (spufs_switch_log_avail(ctx) > 1) {
2553 struct switch_log_entry *p;
2554
2555 p = ctx->switch_log->log + ctx->switch_log->head;
2556 ktime_get_ts(&p->tstamp);
2557 p->timebase = get_tb();
2558 p->spu_id = spu ? spu->number : -1;
2559 p->type = type;
2560 p->val = val;
2561
2562 ctx->switch_log->head =
2563 (ctx->switch_log->head + 1) % SWITCH_LOG_BUFSIZE;
2564 }
2565
2566 wake_up(&ctx->switch_log->wait);
2567 }
2568
2569 static int spufs_show_ctx(struct seq_file *s, void *private)
2570 {
2571 struct spu_context *ctx = s->private;
2572 u64 mfc_control_RW;
2573
2574 mutex_lock(&ctx->state_mutex);
2575 if (ctx->spu) {
2576 struct spu *spu = ctx->spu;
2577 struct spu_priv2 __iomem *priv2 = spu->priv2;
2578
2579 spin_lock_irq(&spu->register_lock);
2580 mfc_control_RW = in_be64(&priv2->mfc_control_RW);
2581 spin_unlock_irq(&spu->register_lock);
2582 } else {
2583 struct spu_state *csa = &ctx->csa;
2584
2585 mfc_control_RW = csa->priv2.mfc_control_RW;
2586 }
2587
2588 seq_printf(s, "%c flgs(%lx) sflgs(%lx) pri(%d) ts(%d) spu(%02d)"
2589 " %c %llx %llx %llx %llx %x %x\n",
2590 ctx->state == SPU_STATE_SAVED ? 'S' : 'R',
2591 ctx->flags,
2592 ctx->sched_flags,
2593 ctx->prio,
2594 ctx->time_slice,
2595 ctx->spu ? ctx->spu->number : -1,
2596 !list_empty(&ctx->rq) ? 'q' : ' ',
2597 ctx->csa.class_0_pending,
2598 ctx->csa.class_0_dar,
2599 ctx->csa.class_1_dsisr,
2600 mfc_control_RW,
2601 ctx->ops->runcntl_read(ctx),
2602 ctx->ops->status_read(ctx));
2603
2604 mutex_unlock(&ctx->state_mutex);
2605
2606 return 0;
2607 }
2608
2609 static int spufs_ctx_open(struct inode *inode, struct file *file)
2610 {
2611 return single_open(file, spufs_show_ctx, SPUFS_I(inode)->i_ctx);
2612 }
2613
2614 static const struct file_operations spufs_ctx_fops = {
2615 .open = spufs_ctx_open,
2616 .read = seq_read,
2617 .llseek = seq_lseek,
2618 .release = single_release,
2619 };
2620
2621 const struct spufs_tree_descr spufs_dir_contents[] = {
2622 { "capabilities", &spufs_caps_fops, 0444, },
2623 { "mem", &spufs_mem_fops, 0666, LS_SIZE, },
2624 { "regs", &spufs_regs_fops, 0666, sizeof(struct spu_reg128[128]), },
2625 { "mbox", &spufs_mbox_fops, 0444, },
2626 { "ibox", &spufs_ibox_fops, 0444, },
2627 { "wbox", &spufs_wbox_fops, 0222, },
2628 { "mbox_stat", &spufs_mbox_stat_fops, 0444, sizeof(u32), },
2629 { "ibox_stat", &spufs_ibox_stat_fops, 0444, sizeof(u32), },
2630 { "wbox_stat", &spufs_wbox_stat_fops, 0444, sizeof(u32), },
2631 { "signal1", &spufs_signal1_fops, 0666, },
2632 { "signal2", &spufs_signal2_fops, 0666, },
2633 { "signal1_type", &spufs_signal1_type, 0666, },
2634 { "signal2_type", &spufs_signal2_type, 0666, },
2635 { "cntl", &spufs_cntl_fops, 0666, },
2636 { "fpcr", &spufs_fpcr_fops, 0666, sizeof(struct spu_reg128), },
2637 { "lslr", &spufs_lslr_ops, 0444, },
2638 { "mfc", &spufs_mfc_fops, 0666, },
2639 { "mss", &spufs_mss_fops, 0666, },
2640 { "npc", &spufs_npc_ops, 0666, },
2641 { "srr0", &spufs_srr0_ops, 0666, },
2642 { "decr", &spufs_decr_ops, 0666, },
2643 { "decr_status", &spufs_decr_status_ops, 0666, },
2644 { "event_mask", &spufs_event_mask_ops, 0666, },
2645 { "event_status", &spufs_event_status_ops, 0444, },
2646 { "psmap", &spufs_psmap_fops, 0666, SPUFS_PS_MAP_SIZE, },
2647 { "phys-id", &spufs_id_ops, 0666, },
2648 { "object-id", &spufs_object_id_ops, 0666, },
2649 { "mbox_info", &spufs_mbox_info_fops, 0444, sizeof(u32), },
2650 { "ibox_info", &spufs_ibox_info_fops, 0444, sizeof(u32), },
2651 { "wbox_info", &spufs_wbox_info_fops, 0444, sizeof(u32), },
2652 { "dma_info", &spufs_dma_info_fops, 0444,
2653 sizeof(struct spu_dma_info), },
2654 { "proxydma_info", &spufs_proxydma_info_fops, 0444,
2655 sizeof(struct spu_proxydma_info)},
2656 { "tid", &spufs_tid_fops, 0444, },
2657 { "stat", &spufs_stat_fops, 0444, },
2658 { "switch_log", &spufs_switch_log_fops, 0444 },
2659 {},
2660 };
2661
2662 const struct spufs_tree_descr spufs_dir_nosched_contents[] = {
2663 { "capabilities", &spufs_caps_fops, 0444, },
2664 { "mem", &spufs_mem_fops, 0666, LS_SIZE, },
2665 { "mbox", &spufs_mbox_fops, 0444, },
2666 { "ibox", &spufs_ibox_fops, 0444, },
2667 { "wbox", &spufs_wbox_fops, 0222, },
2668 { "mbox_stat", &spufs_mbox_stat_fops, 0444, sizeof(u32), },
2669 { "ibox_stat", &spufs_ibox_stat_fops, 0444, sizeof(u32), },
2670 { "wbox_stat", &spufs_wbox_stat_fops, 0444, sizeof(u32), },
2671 { "signal1", &spufs_signal1_nosched_fops, 0222, },
2672 { "signal2", &spufs_signal2_nosched_fops, 0222, },
2673 { "signal1_type", &spufs_signal1_type, 0666, },
2674 { "signal2_type", &spufs_signal2_type, 0666, },
2675 { "mss", &spufs_mss_fops, 0666, },
2676 { "mfc", &spufs_mfc_fops, 0666, },
2677 { "cntl", &spufs_cntl_fops, 0666, },
2678 { "npc", &spufs_npc_ops, 0666, },
2679 { "psmap", &spufs_psmap_fops, 0666, SPUFS_PS_MAP_SIZE, },
2680 { "phys-id", &spufs_id_ops, 0666, },
2681 { "object-id", &spufs_object_id_ops, 0666, },
2682 { "tid", &spufs_tid_fops, 0444, },
2683 { "stat", &spufs_stat_fops, 0444, },
2684 {},
2685 };
2686
2687 const struct spufs_tree_descr spufs_dir_debug_contents[] = {
2688 { ".ctx", &spufs_ctx_fops, 0444, },
2689 {},
2690 };
2691
2692 const struct spufs_coredump_reader spufs_coredump_read[] = {
2693 { "regs", __spufs_regs_read, NULL, sizeof(struct spu_reg128[128])},
2694 { "fpcr", __spufs_fpcr_read, NULL, sizeof(struct spu_reg128) },
2695 { "lslr", NULL, spufs_lslr_get, 19 },
2696 { "decr", NULL, spufs_decr_get, 19 },
2697 { "decr_status", NULL, spufs_decr_status_get, 19 },
2698 { "mem", __spufs_mem_read, NULL, LS_SIZE, },
2699 { "signal1", __spufs_signal1_read, NULL, sizeof(u32) },
2700 { "signal1_type", NULL, spufs_signal1_type_get, 19 },
2701 { "signal2", __spufs_signal2_read, NULL, sizeof(u32) },
2702 { "signal2_type", NULL, spufs_signal2_type_get, 19 },
2703 { "event_mask", NULL, spufs_event_mask_get, 19 },
2704 { "event_status", NULL, spufs_event_status_get, 19 },
2705 { "mbox_info", __spufs_mbox_info_read, NULL, sizeof(u32) },
2706 { "ibox_info", __spufs_ibox_info_read, NULL, sizeof(u32) },
2707 { "wbox_info", __spufs_wbox_info_read, NULL, 4 * sizeof(u32)},
2708 { "dma_info", __spufs_dma_info_read, NULL, sizeof(struct spu_dma_info)},
2709 { "proxydma_info", __spufs_proxydma_info_read,
2710 NULL, sizeof(struct spu_proxydma_info)},
2711 { "object-id", NULL, spufs_object_id_get, 19 },
2712 { "npc", NULL, spufs_npc_get, 19 },
2713 { NULL },
2714 };
Linux with added FPC-III support